Research Topics
| T UllerSummaryCountry: Sweden Publications
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Detail Information
Publications
Variation in heritability of tadpole growth: an experimental analysisT Uller
Department of Zoology, University of Gothenburg, Box 463, SE 405 30, Gothenburg, Sweden
Heredity (Edinb) 88:480-4. 2002....
Long-lasting fitness consequences of prenatal sex ratio in a viviparous lizardTobias Uller
Department of Zoology, Goteborg University, Medicinaregatan 18, SE 405 30 Goteborg, Sweden
Evolution 58:2511-6. 2004..Thus, the sex ratio experienced during gestation can have profound and long-lasting effects on fitness in natural populations of viviparous animals, with important implications for life-history evolution and sex allocation...
Prenatal exposure to testosterone increases ectoparasite susceptibility in the common lizard (Lacerta vivipara)Tobias Uller
Department of Zoology, Medicinaregatan 18, SE 405 30 Goteborg, Sweden
Proc Biol Sci 270:1867-70. 2003....
Family and population effects on disease resistance in a reptileT Uller
1Department of Zoology, University of Gothenburg, Medicinaregatan 18, S 405 30 Gothenburg, Sweden
Heredity (Edinb) 91:112-6. 2003..Thus, this study confirms the importance of genetic (family) effects on pathogen resistance with variation in this trait among natural populations...
Viviparity as a constraint on sex-ratio evolutionTobias Uller
Department of Zoology, University of Gothenburg, Medicinaregatan 18, SE 405 30, Gothenburg, Sweden
Evolution 57:927-31. 2003....
Prenatal sex ratios influence sexual dimorphism in a reptileTobias Uller
Department of Zoology, University of Goteborg, 413 90 Goteborg, Sweden
J Exp Zool A Comp Exp Biol 295:183-7. 2003..In males, the difference in allometry between sex ratio environments remained over time, whereas in females the corresponding effect disappeared...
A genetic component of resistance to fungal infection in frog embryosJörgen Sagvik
Department of Zoology, University of Gothenburg, Medicinaregatan 18, 413 90 Goteborg, Sweden
Proc Biol Sci 275:1393-6. 2008..Thus, there is likely to be a significant genetic component in embryonic resistance to fungal infection in frog embryos. Early developmental stages may show more diverse defences against pathogens than has previously been acknowledged...
Is sexual dimorphism affected by the combined action of prenatal stress and sex ratio?Tobias Uller
Department of Zoology, Goteborg University, Sweden
J Exp Zool A Comp Exp Biol 303:1110-4. 2005..Embryonic steroid exposure can potentially be an important factor in generating individual variation in natural populations of viviparous animals...
The role of Haldane's rule in sex allocationMats Olsson
Department of Zoology, The University of Gothenburg, Animal Ecology, 413 90 Gothenburg, Sweden
Evolution 59:221-5. 2005..If our study has general applicability across taxa, it predicts taxon-specific sex allocation effects depending on which sex is the heterogametic one...
Differential sex allocation in sand lizards: bright males induce daughter production in a species with heteromorphic sex chromosomesMats Olsson
Department of Zoology, University of Gothenburg, 413 90 Gothenburg, Sweden
Biol Lett 1:378-80. 2005..However, it also suggests that this has probably evolved through natural selection for increased offspring viability (primarily through production of daughters), rather than through increased mate attraction (e.g. sexy sons)...
Effects of egg yolk testosterone on growth and immunity in a precocial birdS Andersson
Department of Zoology, , Sweden
J Evol Biol 17:501-5. 2004..Adaptive scenarios where only beneficial effects of increased testosterone levels are considered may therefore need to be re-evaluated...
Consistent sex ratio bias of individual female dragon lizardsTobias Uller
School of Biological Sciences, University of Wollongong, 2500 New South Wales, Australia
Biol Lett 2:569-72. 2006..Furthermore, sex ratios were not influenced by incubation temperature. However, the variation among females resulted in female-biased mean population sex ratios at hatching both within and among years...
No seasonal sex-ratio shift despite sex-specific fitness returns of hatching date in a lizard with genotypic sex determinationTobias Uller
School of Biological Sciences, University of Wollongong, 2522 New South Wales, Australia
Evolution 60:2131-6. 2006..The results are discussed in relation to potential constraints on sex-ratio adjustment, alternative selection pressures, and the evolution of temperature-dependent sex determination...
Sex-specific sibling interactions and offspring fitness in vertebrates: patterns and implications for maternal sex ratiosTobias Uller
School of Biological Sciences, University of Wollongong, NSW 2522, Australia
Biol Rev Camb Philos Soc 81:207-17. 2006....
The evolution of sex ratios and sex-determining systemsTobias Uller
School of Biological Sciences, University of Wollongong, Wollongong, NSW 2522, Australia
Trends Ecol Evol 22:292-7. 2007..Thus, equal sex ratios might be an emergent character of sex-determining systems even when biased sex ratios are favored by selection...
Sons are made from old stores: sperm storage effects on sex ratio in a lizardMats Olsson
School of Biological Sciences, University of Wollongong, Wollongong, New South Wales 2522, Australia
Biol Lett 3:491-3. 2007..Thus, shifts in sex ratio, for example over the reproductive season, can partly be explained by different survival of son-producing sperm or some unidentified female mechanism taking effect during prolonged storage...
Mating system variation and morph fluctuations in a polymorphic lizardMats Olsson
School of Biological Sciences, University of Wollongong, NSW 2522, Australia
Mol Ecol 16:5307-15. 2007..unsuccessful mate acquisition showed that red males were under negative selection when they dominated the population, which suggests ongoing frequency dependent selection on male colouration...
Free radicals run in lizard familiesMats Olsson
School of Biological Sciences, University of Wollongong, Wollongong, NSW 2522, Australia
Biol Lett 4:186-8. 2008..We suggest that the evolution of ROS dynamics may be ROS species specific and perhaps depend on the relative degree of uni- or biparental inheritance of ROS main regulatory pathways...
Continuous male presence required for fertilization in captive painted dragons, Ctenophorus pictusTobias Uller
School of Biological Sciences, University of Wollongong, Australia
J Exp Zool A Comp Exp Biol 303:1115-9. 2005..When housed continuously together with males, however, follicle recruitment and fertilization were achieved. Thus, not only ovarian growth, but also fertilization, is dependent on male stimuli...
Carotenoid intake does not mediate a relationship between reactive oxygen species and bright colouration: experimental test in a lizardMats Olsson
School of Biological Sciences, The University of Wollongong, NSW 2522, Australia
J Exp Biol 211:1257-61. 2008..Thus, carotenoid intake does not reduce circulating levels of ROS or bSO, suggesting that carotenoids are inefficient antioxidants in vivo and, therefore, are unlikely to provide a direct link between oxidative stress and colouration...
